Copper is a trace mineral your body needs. It helps form red blood cells, keeps iron moving properly, supports nerves, and aids immune health. You get copper from shellfish, nuts, seeds, and organ meats.
People take a copper supplement to fix low levels or to balance long-term zinc use, since zinc can block copper absorption. You will also find it inside multivitamins. A typical dose is small, usually 0.5 to 2 mg.
Take copper with food to avoid stomach irritation. Large amounts can cause nausea, vomiting, or liver damage. Anyone with Wilson's disease must stay away from copper supplements completely. Excess copper may also disrupt zinc and iron levels when taken in high amounts over time.